This reverts commit ac5d529c65. We're
failing 4 of the tests:
dEQP-VK.reconvergence.subgroup_uniform_control_flow_ballot.compute.nesting4.1.2
dEQP-VK.reconvergence.subgroup_uniform_control_flow_elect.compute.nesting4.1.2
dEQP-VK.reconvergence.workgroup_uniform_control_flow_ballot.compute.nesting4.1.2
dEQP-VK.reconvergence.workgroup_uniform_control_flow_elect.compute.nesting4.1.2
This is because we aren't guaranteeing re-convergence for loop
continues.
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/28221>